custom post type taxonomies UI radiobuttons not checkboxes

Is there a way to replace the default checkboxes by radio buttons in the custom post type taxonomy UI?
I have custom post type ‘questions’ with taxonomy ‘answer type’ (single selection [radio button], multiple selection [checkboxes] and pattern matching [dropdown boxes). I need to make sure the users can only pick one option from ‘answer type’. Is there a way to get this done?

How to modify a taxonomy that’s already registered

Today I needed to change the arguments on a custom taxonomy that was already registered by a third party plugin. Specifically I wanted to set the show_admin_column argument to true and change the rewrite slug so that it wasn’t just the taxonomy slug. In this case, it was a “People” post type with a “People Category” custom taxonomy.